Phoenix metro · Free attic inspection
Attic Insulation in Phoenix, AZ
Most Phoenix attics were insulated once, when the house was built, and never touched again. If yours was built before the mid-1990s it is probably sitting at about half the depth the Department of Energy now recommends for this climate zone. We measure what is actually up there, tell you where you stand, and quote the work before anything starts.
The short answer
What attic insulation actually does in a Phoenix summer
Attic insulation slows the heat moving from your attic into the rooms below. On a 112° afternoon a Valley attic commonly runs 150°F or hotter, and that heat keeps radiating down through the ceiling for hours after sunset, which is why the air conditioner runs long into the evening. Depth is what stands between that attic and your living space. Adding insulation does not make the attic cooler; it makes the heat take much longer to reach you, so the system cycles less and holds temperature longer between cycles.
It is a one-time job. There is no maintenance schedule, nothing to re-treat, and nothing to replace on a cycle. Done properly it outlasts the roof.
How much you need
R-38 to R-49 is the target for this climate zone
The Department of Energy puts Phoenix in climate zone 2 and recommends an attic value of R-38 to R-49. R-value measures resistance to heat flow, and it adds up with depth, so the question on any Phoenix attic is not which brand is up there, it is how many inches.
A technician measures the existing depth against the attic card, identifies the material, and works out what you currently have. From there the gap is arithmetic: blown cellulose adds roughly 3.2 to 3.8 R per inch, so getting a shallow attic to R-38 usually means another six to ten inches on top of what is there. ENERGY STAR estimates sealing and insulating can cut heating and cooling costs by up to 20 percent depending on climate zone and the condition of the home.
Two ways the job gets done
Blow over what is there, or take it out first
Almost every Phoenix attic falls into one of two jobs, and which one you need is decided in the attic, not on the phone.
Blow over the existing insulation. If what is up there is dry, clean and evenly spread, we leave it and add depth on top until the attic hits target. It is the faster and cheaper of the two, and it is what most homes need.
Remove and replace. If the existing material is contaminated with rodent droppings, water damaged, matted flat, or so unevenly distributed that adding to it would just bury the problem, it comes out first. The attic is cleaned and sanitized, then new insulation goes down on a bare deck. This is the job people find out they need after an infestation or a roof leak.
Pricing is quoted per job either way. It depends on attic square footage, how much material is already up there, how hard the attic is to work in, and whether the old material has to come out. The inspection is free and the quote is written before any work starts.
Materials
Which material goes in a Phoenix attic
Blown-in loose fill is the standard for a retrofit because it flows around joists, wiring and the odd shapes an attic is full of. Batts have to be cut to fit and leave gaps wherever they meet an obstruction, which is why they underperform their label in a real attic. Here is how the three common options compare.
| Borate cellulose (TAP) | Blown fiberglass | Fiberglass batts | |
|---|---|---|---|
| R-value per inch | 3.2 – 3.8 settled | 2.2 – 2.7 settled | 2.5 – 4.0 nominal |
| Depth to reach R-38 | About 10 – 12 in. | About 14 – 17 in. | About 10 – 15 in. |
| Fills around joists and wiring | Yes: blown in loose, conforms to the deck | Yes: blown in loose | No: cut to fit, leaves gaps at obstructions |
| Treated for insects | Yes: EPA-registered borate | No | No |
| Made from | Mostly post-consumer paper, treated with boric acid | Spun glass fiber | Spun glass fiber in rolls or pre-cut pieces |
R-values per inch from the U.S. Department of Energy’s Building America Solution Center. Depth figures are calculated from those ranges; actual depth depends on the product and how it is installed.
Order of operations
Insulation is the last step, not the first
If anything is living in the attic, insulation is the wrong place to start. New material blown over an open entry point just gets nested in, and you have paid to bury the problem instead of fixing it. The sequence that works is seal, clean, then insulate.
Scratching or scurrying overhead, droppings in the attic, or a smell that will not clear means a rodent inspection comes first. From there the work is sealing the entry points along the roof line and eaves, then attic cleanup and sanitization to remove the contaminated material and neutralize the odor. Insulation goes in last, on a deck that is clean and closed. Roof rats are the usual culprit in the Valley, and that is its own job.
If the attic is clear and dry, none of that applies and we go straight to the insulation.
What we install
We install TAP: cellulose that is also a pest control product
The cellulose we blow is Thermal, Acoustical, Pest Control insulation. It is recycled paper treated with boric acid, which makes it an EPA-registered pesticide and an ENERGY STAR qualified insulation at the same time. Self-grooming insects walk through it, clean themselves, and ingest the borate. It does nothing to rats or mice, and it is not a substitute for regular service, but on a product we were going to blow anyway, the treated layer is free upside.
If you want the detail (the pest list on the label, safety around kids and pets, how long the treated layer lasts), that is all on the TAP insulation page.
Questions we get
Attic insulation in Phoenix, answered
How much does attic insulation cost in Phoenix?
It is quoted per job rather than priced by the square foot. The figure depends on attic size, how much insulation is already up there, how easy the attic is to get into, and whether the old material has to come out first. The inspection is free and the quote is written before any work starts.
What R-value should a Phoenix attic have?
The Department of Energy recommends R-38 to R-49 for attics in climate zone 2, which covers Phoenix. A technician measures your existing depth against the attic card to work out where you currently stand.
How long does attic insulation take to install?
A straightforward blow-over on a typical Valley home is usually a single day. A removal and replacement takes longer, because the old material has to come out and the attic has to be cleaned before anything new goes down.
Do I have to remove my old insulation?
Not usually. If the existing material is dry, clean and evenly spread, new insulation goes right on top of it. Removal is for attics where the old material is contaminated, water damaged, or matted flat.
Will new insulation help with the noise?
Some. Cellulose is denser than fiberglass, so it dampens airborne noise coming through the ceiling better than what is likely up there now. It is a side benefit, not the reason to do the job.
Is it worth insulating an older Phoenix home?
That is usually where the biggest gap is. Homes built before the mid-1990s were commonly insulated to roughly half of what is recommended today, so they have the most room to gain. The measurement tells you whether that applies to your house.
Free attic inspection
Get a quote for attic insulation in Phoenix
Tell us the address and what is up there now. A technician measures your existing depth, checks for entry points and moisture, and writes the quote before any work starts. Prefer to talk it through? Call 623-289-3375.
Meet the Team
The licensed technicians who actually show up at your door. Bees and wasps, rodents, attic cleanouts and insulation, all handled by the same crew.
Evan
Shaun
Ryan
Victor
Carter
Bryan
Ian
Cliff
Cartreal
Ethan
Miguel
Now booking Phoenix metro
Have the attic looked at before next summer
A technician measures what is up there, checks for entry points and moisture, and writes the quote on the spot. Serving Phoenix, Mesa, Chandler, Scottsdale, Glendale, Peoria, Tempe, Gilbert and the surrounding Valley.